利用光泵浦GaAs微针尖观察自旋相关隧穿电流

Digest of Papers. Microprocesses and Nanotechnology '99. 1999 International Microprocesses and Nanotechnology Conference Pub Date : 1999-07-06 DOI:10.1109/IMNC.1999.797510

R. Shinohara, K. Yamaguchi

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引用次数: 0

摘要

利用光激发GaAs尖端的自旋极化扫描隧道显微镜(SP-STM)有望以原子空间分辨率观察磁畴和表面自旋结构。圆偏振光抽运可以在砷化镓导带中产生自旋极化电子。我们开发了GaAs微针尖，并尝试实现SP-STM系统。本文报道了GaAs微针尖表面状态对自旋相关隧穿电流的影响。这种效应对于在使用GaAs尖端的SP-STM中获得高灵敏度非常重要。

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Observation of spin-dependent tunneling current using optically pumped GaAs microtip

The spin-polarized scanning tunneling microscope (SP-STM) using a photoexcited GaAs tip has been expected to observe magnetic domains and surface spin structures with atomic spatial resolution. Spin-polarized electrons can be generated in the GaAs conduction band by circularly polarized light pumping. We developed GaAs microtips and are trying to realize the SP-STM system. In this paper, we report the influence of surface states of the GaAs microtip on the spin-dependent tunneling current. This effect is very important to obtain high sensitivity in the SP-STM using a GaAs tip.

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Digest of Papers. Microprocesses and Nanotechnology '99. 1999 International Microprocesses and Nanotechnology Conference

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